180540497 has 4 divisors (see below), whose sum is σ = 186364416. Its totient is φ = 174716580.

The previous prime is 180540491. The next prime is 180540523. The reversal of 180540497 is 794045081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 794045081 = 1993 ⋅398417.

It is a cyclic number.

It is not a de Polignac number, because 180540497 - 2¹⁶ = 180474961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 180540497.

It is not an unprimeable number, because it can be changed into a prime (180540491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2911913 + ... + 2911974.

It is an arithmetic number, because the mean of its divisors is an integer number (46591104).

Almost surely, 2^180540497 is an apocalyptic number.

It is an amenable number.

180540497 is a deficient number, since it is larger than the sum of its proper divisors (5823919).

180540497 is an equidigital number, since it uses as much as digits as its factorization.

180540497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823918.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 180540497 is about 13436.5359002981. The cubic root of 180540497 is about 565.1861938873.

The spelling of 180540497 in words is "one hundred eighty million, five hundred forty thousand, four hundred ninety-seven".